Norbu is also used as a feminine given name in Tibetan and Bhutanese. However, it's more common for males. So, I think that the "Gender" of this name should be updated from "Masculine" to "Masculine & Feminine".Sources: https://forebears.io/x/forenames/norbu https://www.names.org/n/norbu/about
Sources: https://forebears.io/x/forenames/norbu
https://www.names.org/n/norbu/about